The obelisk marks the detonation site.
This was the only indication of radiation anywhere. It was posted facing out on the chain-link fence surrounding what was the crater.
This is the farmhouse where the bomb was assembled.
There was a bunker where the original surface of the crater was visible, but that was blocked off and locked up. At the farmhouse, we weren't allowed to go to the old barn and corrals. Still, it was interesting and because of what happened here, an impressive unimpressive place.